Improvement in machines for cutting heels of boots and shoes



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MQ fw dtted States @anni '(ejiyiim RICHARD C.A LAMBART, OF SOUTH. ABINGTONQASSIG'NOR TO DAVI WHITTEMORE OFv NORTH BRIDGEWATER, MASSACHUSETTS.

Letters Patent No. 108,605, dated October 25, 1870.

IMPRovi-:MENT IN MAcHiNl-:s FOR comme HEELs oFBooTs ANDl sHoEs'.

The Schedule referred to in 'these Letters Patent andinakiug part ortne same I, RICHARD O. LAMBAn'r, of South Abington, in

Y chucked, to take the proper position to be operated Vupon by the trimming mechanism.

Second, in a device for registering the position of a shoe operated'npon by the vcutt-ing mechanism in a heel-trimming machine, in order that shoes of the same shape and size thereafter operated upon may be trimmed in the same manner and to the same extent.

Third, in making thepattern and its cam -groove detachable from the jack, that. right and left heels, as well as heels of different sizes, may be trimmed upon the same machine.

Fourth, in an improved device for releasing and ii'X-f ing the center of oscillation of the jack.

In the drawing- Figure 1 isa fiontfelemtion of the machine.

Figure 2 is an elevation, showing the. parts to the right of the dotted line in iig. 1.

Figure 3 is a detached View of my center-guide" in the same position 'in which it is shown in iig. 2, but of double the size.

Figure 4 is a plan of the same.

Figure 5 is a detached view, showing the pattern, cam, and cam-groove', and their connection with the jack.

A is the frame of the machine.

B is the jack, constructed substantially as in the4 machine patented as aforesaid, in 1868, and having the same oscillating and reciprocating -movementsf` .As described in the former patent, the jack derives its movements from the main shaft O, through a pine ion, D, on the main shaft, meshing into a toothed wheel, E,which engages with a toothed segment, F, rigidly attached to the jack, andoscillates upon journals, in proper boxes, in blocks sliding back and forth in the ways H, describing a half-circle at eaclnoscil lation. f These sliding blocks are not shown in the drawing as in the old machine however, they are held in their places, when vthe jack is to rotate, by pins a a; but I have invented a new device for raising the pins and 1 releasing the sliding .blocks when the jack is to travel forward or back,.viz., two bars b b are secured to the pinsa a by set-screws c c, which bars at the. proper times are acted upon by two cams h h upon the jack,l thus raising the pins, or allowing them to fall into the sliding blocks by force of the leaf or spiral springs "-'llle jackhastwo pins p p, which, during a vpart of the movement 'of the jack, run in the ways H.

' J is the heelpattern, provided with a cam, G, and

cam-guide S, the two latter forming a cam-groove, s,

to control the movement of the rocking knife,.as described in my patent dated November 16, 1869.

Thel principal oiice of the patternl J is to serve as a rest for the heel, that the edge of the heel may be properly cut by the knife, and that the side edge of the heel maynot be crowded over upon the tread.

It alsol serves as a bearing forthe rocking knife-stock.,l

The pattern, cam, and cam-guide are cast m one piece, and secured tothe jack by dowel pins o o, as shown lin iig. 5. 1 l -The knife-stock consists'of two parts X X', as de-v scribed in my patent of 1869. f

,A roller attached to the rocking knife, and ruiming in the cani-groove, determines the movement of the rocking knife, and the angle at whichit is presented to the heelto be operated upon. The knife islfurther controlled by the lever .l, as before.-

As in the former machine, the lever is pivoted at 'at to the st anchion V, which is pivoted to and turns horizontally upon the frame A,.and it is connected with the ways W by links w fw. s

The device for registering the lposition of a shoe, the heel of which is trimmed' in the machine, consists of t-wo slotted arms, k and 7c', attached to the bar got' Y' 'leather of the' shoe on the last; the arm tf of the recess is so inclined as to strike against .the tread of the sole at a higher or lower point, according to the thickness and bend of thesole; the slot vin the arm k allows the toe-rest a movement back and forth in the direct-ion of the slot, a dovetaled tongue and groove, giving tothe toe-rest a free movement'at right angles tothe slot, as shown, to allowithe il'e cess thto accommodate itself to the sole ofthe shoe. To the arm k, by means of aset-screw, z2, a slotted bar, fm, and an upright bar, n, as sliown, is attached a slide-rest, l, having a recess, l', for the sole of the slice.

y'.lhe following isthe methodby which the position of a shoe is registered by the device just described :r y

A shoe upon thelast is jacked by the eye, and trimmed, as directed in the previous patent of 1.869.

The set-screw a being loose-in the slot of thearm k, the registering apparatus is raised until the toerest strikes the toe of the shoe, receiving the sole in the recess t', the toe-rest at thesanie-time being moved away from or'toward the'bar g of the jack, that the arm t of the toe-rest may press against one side ot' the shoe, and being secured in that 'po` sition'by theset-screw z; the side rest Z is then moved up against the other-side of 'the shoe, the` recess l' receiving thesole, and' is there secured by the set-screw z". The registering device is now set for all shoes of' the kind and size of the shoe jacked at the beginning of the operation, and with respect to thev shoes uponwhich the heel-trimming operation is to be continued, may he considered as a ccnvlefts as well as with straight shoes; the toe-rest and side-rest being` moved further from the bar g forafright than for a left or straight I provide my machines each with several patterns .and cam-grooves for rights and lefts, as well as straightsrof various sizes; vand that the piececon taining the pattern and cam-groovepiay be readily taken out ofthe machine and another substituted, I secure it by dowel-pins, as hereinbefore stated. The same` pattern and groove, however, will answer for both a right and a left shoe ofthe same size.

Since the sizes and shapes of shoes are pret-typaccuratelyknown by their numbers, `I mark my centerguide with several scales, that, without'experiment,

`it may at, once4 be set for ai shoe of any size, either right orleft. A scale on the 4slotted'varm It, with `an indicator on'the bar g ot the jack, shows how much the attachment is to be raised or lowered for a shoe of any given size.

Inlike manner there are two scales on the arm k', one for left shoes ou one side of the slot, and the other-for right shoes on the other side; and there are similar scales on the slotted bar an.

,An operator, after a little experience, will readily allow for slight variations, diiercnt manufacturers make in the size'and sha-pe of' shoes of the same number.. The scales above referred ,to are not shown in the drawn-ig. 'Instead of raising the toe-rest by means ofthe slotted arm 1.-., itf might be attached to the arm k by an independent slotted arm, and so be raised or lowered independeutlyof the rest of the center-guide. It is obvious that other points than the extreme right sideand extreme left side of a shoe might bc taken to determine the proper position of thesho'e upon the jack.

\Vhere much work is done upon slices of the same pattern, a fork extending from the arm i of' the jack,

so as to embrace thevshoe-last, in combination with a toe-rest, would be snticient for this purpose; or, a hollow frame or case might be adapted to receive a part of thelastedshoe, so as to determine the position of the heel.

my invention, the'object oi' this part of the invention being to furnish aguide by which the heel, onV

being screwed up against the pattern, will be compelled to take the proper position as to its center.

.1. A centerguide, substantially as' described, for

4the purpose described.

2. A device for registering the position of a shoe-'op- Vverated upon ina heel-trimming machine, substantially as described, that shoes of the samepattern thereail ter operated upon may-be trimmed in the same mauner and to the same extent 3. 'lhe piece containing the pattern and cam-groove,

when secured to the jack by dowel-p'ins, that it may be readily removed from the machine and another substituted in its place.

4. A detacl1able`heel-rest or patternand cam-groove in combination with a center-guide, substantiallyas described, to adapt the machine for shoes of any size. 5. The improved device for releasing-and fixing the' center of oscillation of the jack, as described.-

The above specification of my said invention signed and witnessed at Boston this 29th day of J une, A.

D'. 1870. y l

RICHARD O.'LAMBART. VVitnesses:

WILLIAM W. SWAN, OHAs. l. GORELY.

Such devices would come within l 

